$CSTE stock is up 10% today. Here's what we see in our data.

$CSTE stock has now risen 10% today, according to our price data from Polygon. There has been approximately $1,190,936 of trading volume.

Here is what we see in our data on $CSTE (you can track the company live on Quiver's $CSTE stock page):

$CSTE Insider Trading Activity

$CSTE insiders have traded $CSTE stock on the open market 1 times in the past 6 months. Of those trades, 0 have been purchases and 1 have been sales.

Here’s a breakdown of recent trading of $CSTE stock by insiders over the last 6 months:

• DAVID VINCENT CULLEN (Managing Director, APAC) sold 7,025 shares for an estimated $11,029

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$CSTE Hedge Fund Activity

We have seen 8 institutional investors add shares of $CSTE stock to their portfolio, and 20 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

• PHOENIX FINANCIAL LTD. removed 3,748,541 shares (-100.0%) from their portfolio in Q1 2026, for an estimated $4,010,938
• JANE STREET GROUP, LLC added 488,003 shares (+1136.2%) to their portfolio in Q1 2026, for an estimated $522,163
• UBS GROUP AG removed 249,975 shares (-56.6%) from their portfolio in Q1 2026, for an estimated $267,473
• YELIN LAPIDOT HOLDINGS MANAGEMENT LTD. removed 90,000 shares (-57.7%) from their portfolio in Q1 2026, for an estimated $96,300
• MILLENNIUM MANAGEMENT LLC removed 79,328 shares (-32.7%) from their portfolio in Q1 2026, for an estimated $84,880
• MEITAV INVESTMENT HOUSE LTD removed 73,638 shares (-100.0%) from their portfolio in Q1 2026, for an estimated $78,792
• LPL FINANCIAL LLC added 50,432 shares (+inf%) to their portfolio in Q1 2026, for an estimated $53,962

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

You can track data on $CSTE on Quiver Quantitative.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.